Improved cast-steel car-wheel



NiTnD STATES CHARLES XV. STAFFORD, OF SAYBROOK, CONNECTICUT.

IMPROVED CAST-STEEL CAR-WHEEL.

To LZZ whom t may concern:

Be it known that I, CHARLns W. STAF- FORD, of Saybrook, Connecticut, have in- Vented a new and useful Mode or Process of Casting Cast-Steel Can'Wheels; and I do hereby declare that the following is a full and eX- aet description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The nature of my invention consists in the use of' a cast-iron or other suitable metallic shell or core of proper shape for the interior surface of the car-wheel, said shell or core being rigidly supported within a east-iron or other suitable flask or mold made of the desired form of the exterior surface of the wheel, said flask or mold being provided with proper pouring gates, through which the molten steel is poured, directly from the crucible or otherwise, upon and around the shell or core, and being thereby thoroughly amalgamated and welded thereto, thus forming a periect and solid wheel, the inside surface of which is of cast-iron or other suitable metal, and the outer or wearing surface is of caststeel.

To prevent the shell or core from becoming too much heated by the molten steel while pouring, I make the core or shell hollow, and iill the cavity thereof with sand or other suitable material, and perforate the same with airpassages for conveying off the gases and surplus heat.

In the drawings which accompany this specification and form a part thereof, Figure l represents a top view of the metallic flask with one-half` the top removed. Fig. 2 represents a cross-section of the flask and core. Fig. 3 represents a cross-section of the same at the red line 0 o.

To enable those skilled in the art to construct and use my invention, I will now proceed to describe the same.

A, Fig. l, is a metallic mold or flask, the top of which, A', may be constructed in one or more parts, and which is provided with one or more pouring-gates, c c. rThe flask is also provided with bolts or standards 5 5 5 5,

Specification forming part of Letters Patent No. Lil/l, M20, dated September 6, 1864.

which are fitted with keys 6 6 6 6, for holding the sections of the iiask together and secure the same when ready for use. The iiask may be further provided with holes or openings, as desired, for the escape of air and to prevent blowing in the process of' pouring.

I construct the iron core or shell 22, Figs. 2 and 3, which composes the inner surface of the hollow body of the wheel, in any of the ordinary forms. The numerals l l, Figs. 2 and 3, represent the cavity between the outer surface of the core 2 2 and the inside surface ofthe flask A B, and corresponds with the outside of the wheel when cast. rThe core is made hollow, and its cavity 3 3, Fig. 2, is filled with sand or other suitable material.

B represents the lower section of the flask A, and through a hole in its center passes a bolt or standard, d, secured -to the bottom of the flask B by the nut c, and, while passing through the core 2, securing the same in its proper position, and fitting snugly at its upper end in the center of the top of the iiask A. 'The top of the flask Al is further provided with one or more pouring-gates, c c, through which the melted metal reaches the cavity, and filling the space l l forms the wheel. In the sand which fills t-he cavity of the core 2, I make perforations, as may be seen at 4 4, to give vent to the gases or surplus heat generated during the process of pouring.

What I claim as my invention, and desire to secure by Letters Patent, is-

l. The employment, in the casting of eaststeel car-wheels or other cast-steel castings, of

a shell or core made of metal filled with sand, together with the bolt d, or other similar device, in combination with a metallic flask or mold, as and for the purposes described.

2. As an article of manufacture, a east-steel car-wheel, when the same is made as described.

C. IV. STAFFORD.

Vitnesses:

C. D. SMITH, W. F. DENNIS. 

